Volvo D12 d engine no response when disconnecting camshaft speed sensor

the main sencor is cam sensor. crankshaft sensor is used for selfballancing.

If you run engine without cam sensor, engine runs in limp home mode, if youi run engine without crancksaft position sensor, engine may run rouhg with some power loss, w/o both the sensors engine stalls

 

ti fond a problem look for diagnost man with VCADs Pro ore Tech Tool software

 

Use the dashboard computer to read fault codes

 

Reopening thread here, I have a 2008 volvo 670 with a D12 engine and I'm currently having a problem similar to the one described here. The truck starts and runs but at the moment of passing a speed bump or hitting a pothole on the road the truck goes to shut off (no always, sometimes if you the accelerator is pressed down it won't shut off). The dash indicate the speedometer shutting off from ongoing speed to zero. That's the indicator for me to accelerate so it won't shut down.

do you have any suggestions about the nature of this problem? much appreciated. thanks

 

I recommand you to have a close look in the battery box first, loose battery connection or loose wire.
Ben

 

there are positive and negative wires that run to cabin from battery box. As i remember 10 ore 16 mm2.

They may crack inside insolation. Positive and negative studs are on pass side of firewall, hidden with air filter.

Negative wire is usually wight, positive is usually red.

Other weak spot of Volvo is engine wiring near MCFC connector, dr.side, where wires run from cabin to chassis.

Volvo use to install soft cabin suspention for smooth ride and thtas why thin wires crack/

 

Did you fix problem?
I have same symptoms as you described.